[gnome-builder] build: add --with-sanitizer=

[Christian Hergert <chergert src gnome org>]

commit 90a7035346d1c1e3a8995163b7f785e4610be4f9
Author: Christian Hergert <chergert redhat com>
Date:   Wed Oct 12 16:17:05 2016 -0700

    build: add --with-sanitizer=
    
    This allows you to specify a GCC/clang sanitizer by using
    --with-sanitizer=address,undefined etc instead of passing the CFLAGS
    manually. It has the additional benefit that we can provide proper
    error messages when it is not supported.

 configure.ac |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4b5d67b..b315821 100644
--- a/configure.ac
+++ b/configure.ac
@@ -440,6 +440,22 @@ AC_MSG_RESULT([$enable_profiling])
 
 
 dnl ***********************************************************************
+dnl GCC/Clang sanitizer support
+dnl ***********************************************************************
+AC_ARG_WITH([sanitizer],
+            [AS_HELP_STRING([--with-sanitizer=@<:@address/undefined/no@:>@],
+                            [Use specific GCC/Clang analyzer])],
+            [with_sanitizer=$withval],
+            [with_sanitizer=no])
+AS_IF([test "x$with_sanitizer" != "xno"],[
+       AX_CHECK_COMPILE_FLAG([-fsanitize=$withval],
+                             [CFLAGS="$CFLAGS -fsanitize=$withval"
+                              CXXFLAGS="$CXXFLAGS -fsanitize=$withval"],
+                             [AC_MSG_ERROR([-fsanitize=$withval is not supported])])
+])
+
+
+dnl ***********************************************************************
 dnl Setup common cflags and ldflags for plugins
 dnl ***********************************************************************
 PLUGIN_CFLAGS="$PLUGIN_CFLAGS -I\$(top_builddir)/contrib/egg"
@@ -556,6 +572,7 @@ echo "  Enable Profiling (-pg)................ : ${enable_profiling}"
 echo "  Build Test Suite ..................... : ${enable_tests}"
 echo "  Build API reference .................. : ${enable_gtk_doc}"
 echo "  Use cross-referencing in API docs .... : ${enable_doc_cross_references}"
+echo "  Sanitizer ............................ : ${with_sanitizer}"
 echo ""
 echo " Optional libraries"
 echo ""